NaBi(WO4)2, or Double Natrium-Bismuth Tungstate, is a type of scintillation crystal that is used for detecting high-energy radiation. These crystals have a high light output, fast decay time, and good energy resolution, making them useful for applications such as medical imaging, radiation therapy, and particle physics experiments. The performance of NaBi(WO4)2 scintillation crystals can be improved by doping with various elements, such as cerium, to increase the light output and improve the energy resolution.